C언어 2차원 문자열 어레이 동적 생성

#define maxRow 5
#define maxStringLength 32
#define NULL ((void *) 0)

// returns 1 based index
// user must decrement the return value before use.
// returns 0 if not found

int srch( char **result, int rows, char *needle) {
  
  for( int i = 0; i < rows; i++ ) {
       if( strcmp( result[i], needle ) == 0 ) {
         return (i + 1); // increment index by 1, important
       }
  }
  
  return 0;
}

int main() { 

  int subTotal[maxRow];
  char productName[16]; 
  int resultCnt = 0;
  int num;
  
  char s[][16] = { "apple 10", 
                   "apple 15",
                   "pair 20",
                   "melon 12", 
                   "pair 100"
  };
  
  // ***** prepare char string dynamically *****
  char **result = malloc( maxRow * sizeof(char *));
  if( result == NULL ) { puts("Memory allocation error"); return 0; }
  
  for( int i = 0; i < maxRow; i++) {
      result[i] = malloc( maxStringLength * sizeof(char));
      if(result[i] == NULL) { puts("Memory allocation error"); return 0; }
  }
  
 
  // ***** initialize *****
  for( int i = 0; i < maxRow; i++ ) {
       result[i][0] = 0x00; // initialize to Null string;
       subTotal[i] = 0;
  }
  
  //  #####_$$$$$ read and summary  #####_$$$$$
  for( int i = 0; i < sizeof( s) / sizeof( s[0]); i++ ) {
    
       sscanf( s[i], "%s %d", productName, &num);
       
       int indx = srch( result, maxRow, productName);
       if( !indx ) {// if not found
          strcpy( result[resultCnt], productName);
          subTotal[ resultCnt ] = num;
          resultCnt++;
       } else {
          subTotal[ --indx ] += num; // decrement index by 1, important
       }
  }
  
  // ***** print out *****
  for( int i = 0; i < resultCnt ; i++ ) {
       printf("%s    %d\n", result[i], subTotal[i]);
  }
  
  // ***** free array *****
  for( int i = 0; i < maxRow; i++)  {
       free( result[i] ); 
       result[i] = NULL;
  }

  free( result );
  result = NULL;

  return 0;
}

sum4.zip

0.01MB

압축파일을 첨부한다.